Physics flashcards

117 SACE Physics cards across 3 modules (10 definitions, 50 key facts, 18 fill-the-gap, 39 formulas). Each session gives you 20 cards, due cards first. Swipe right for easy, left for hard, down for again. Keyboard: Space to flip, 1 to 4 to rate.

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What this deck covers

Topic 1: Motion and Relativity (47 cards, 10 dot points)
Topic 2: Electricity and Magnetism (35 cards, 8 dot points)
Topic 3: Light and Atoms (35 cards, 7 dot points)

Sample cards from this deck

Definition
Forces and Newton's laws (SACE Stage 2 Physics)
Define Second law
$\vec{F}_{\text{net}} = m\vec{a}$ . The net force and the acceleration point the same way.
Definition
Electromagnetic induction and Faraday's law (SACE Stage 2 Physics)
Define Magnetic flux
$\Phi$ is the magnetic flux (weber, Wb), $B$ the flux density (T), $A$ the area ( $\text{m}^2$ ), and $\theta$ the angle between the field and the normal to the area. Flux is maximum when the field is perpendicular to the area ( $\theta = 0$ ) and zero when the field lies in the plane of the loop ( $\theta = 90^\circ$ ).
Definition
Atomic spectra and the Bohr model (SACE Stage 2 Physics)
Define Emission and absorption spectra
The dark lines in an absorption spectrum occur at exactly the same wavelengths as the bright lines in the emission spectrum of the same element.
Definition
Mass-energy equivalence (SACE Stage 2 Physics)
Define Mass defect and binding energy
The mass defect $\Delta m$ is the difference between the combined mass of the separate nucleons and the actual mass of the nucleus. The binding energy is $E = \Delta m\, c^2$ - the energy needed to pull the nucleus apart into individual nucleons, and equally the energy released when it forms.
Definition
Lenz's law (SACE Stage 2 Physics)
Define Lenz's law and energy conservation
If the induced current instead helped the magnet's motion, the magnet would accelerate on its own, generating electrical energy and kinetic energy from nothing - a perpetual-motion machine.
Definition
The nucleus and radioactivity (SACE Stage 2 Physics)
Define Half-life
The half-life $t_{1/2}$ is the time for half the radioactive nuclei in a sample to decay (and equivalently for the activity to halve). After $n$ half-lives, the fraction remaining is $\left(\tfrac{1}{2}\right)^n$ .
Fill the gap
Conservation of momentum in collisions (SACE Stage 2 Physics)
Equal and opposite impulses mean equal and opposite momentum changes, so the ___ momentum change of the system is zero.
Equal and opposite impulses mean equal and opposite momentum changes, so the total momentum change of the system is zero.
Fill the gap
AC generators and transformers (SACE Stage 2 Physics)
The induced EMF is therefore ___ (AC): it rises to a peak, falls to zero, reverses, and repeats once per revolution.
The induced EMF is therefore alternating (AC): it rises to a peak, falls to zero, reverses, and repeats once per revolution.
Definition
The photon model and Planck's constant (SACE Stage 2 Physics)
Define Wave-particle duality
Light exhibits both wave and particle properties depending on how it is observed. Interference and diffraction (the double-slit experiment) reveal its wave nature; the photoelectric effect reveals its particle nature.
Fill the gap
Momentum and impulse (SACE Stage 2 Physics)
By ___ $\Delta t$ , these devices reduce the average force $F = \Delta p / \Delta t$ on the body.
By extending the contact time $\Delta t$ , these devices reduce the average force $F = \Delta p / \Delta t$ on the body.